9. Find the area of the shaded region:
steps by step explanation
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Answer:
area = πr^2
raidus = 7 cm
= 22/7× (7) ^2
22/7× 49
22× 7
154cm2
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Step-by-step explanation:
given: radius of bigger circle = 10.5 cm, radius of the smaller circle = 3.5 cm
area of shaded portion =
area of bigger circle - area of smaller circle
=> π × 10.5² - π × 3.5²
=> π ( 110.25 - 12.25)
=> 22/7 × 98
=> 308 cm²
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